diff --git a/pyproject.toml b/pyproject.toml
index 375b937..8322890 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ where = ["src"]
 
 [project]
 name = "bazario"
-version = "0.3.0"
+version = "0.4.0"
 readme = "README.md"
 authors = [{ name = "Alim Abrekov", email = "chessinmind17@yandex.ru" }]
 description = "Lightweight handler routing library for modular apps."
diff --git a/src/bazario/asyncio/registry.py b/src/bazario/asyncio/registry.py
index 66a9dea..dcf5ddd 100644
--- a/src/bazario/asyncio/registry.py
+++ b/src/bazario/asyncio/registry.py
@@ -51,7 +51,12 @@ def get_notification_handlers(
         self,
         notification_type: type[Notification],
     ) -> list[type[NotificationHandler]]:
-        return self.notification_handlers.get(notification_type, [])
+        return [
+            handler
+            for notification, handlers in self.notification_handlers.items()
+            for handler in handlers
+            if issubclass(notification_type, notification)
+        ]
 
     def get_pipeline_behaviors(
         self,
diff --git a/src/bazario/registry.py b/src/bazario/registry.py
index ec6536e..0a22226 100644
--- a/src/bazario/registry.py
+++ b/src/bazario/registry.py
@@ -51,7 +51,12 @@ def get_notification_handlers(
         self,
         notification_type: type[Notification],
     ) -> list[type[NotificationHandler]]:
-        return self.notification_handlers.get(notification_type, [])
+        return [
+            handler
+            for notification, handlers in self.notification_handlers.items()
+            for handler in handlers
+            if issubclass(notification_type, notification)
+        ]
 
     def get_pipeline_behaviors(
         self,